Maxim Integrated MAX812MEUS-T Microprocessor Reset Circuit

The MAX812MEUS-T from Maxim Integrated is a highly reliable and compact microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of system reliability and accuracy required in sensitive electronic devices, ensuring that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. This component is essential for maintaining system integrity and preventing software execution errors due to improper system initialization.

Featuring a 4-pin SOT-143 package, the MAX812MEUS-T is optimized for space-constrained applications. It offers a precise factory-trimmed threshold voltage which ensures that the reset output is activated whenever the V<sub>CC supply voltage falls below the preset threshold. Once activated, the reset signal remains asserted for a minimum timeout period after V<sub>CC has risen above the reset threshold level, providing the system with ample time to stabilize.

One of the key attributes of the MAX812MEUS-T is its low supply current, which makes it an ideal choice for portable and battery-operated applications. It operates over a wide voltage range and features an active-low, push-pull reset output, which provides a direct interface to the reset pin of most microprocessors, without the need for external components.

With its built-in ability to reject fast transient glitches on the V<sub>CC line, the MAX812MEUS-T ensures reliable operation of the system under fluctuating power conditions. This component is also characterized for operation over the extended industrial temperature range, making it suitable for a broad array of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-powered equipment.

Overall, the MAX812MEUS-T from Maxim Integrated stands out as a compact, efficient, and robust solution for system designers looking to enhance the reliability of their digital systems through precise monitoring and control of power supply conditions.